diff --git a/RealPlume/RealPlume-1-v0.4.1.ckan b/RealPlume/RealPlume-1-v0.4.1.ckan
index 27274b6c16..820a8902a7 100644
--- a/RealPlume/RealPlume-1-v0.4.1.ckan
+++ b/RealPlume/RealPlume-1-v0.4.1.ckan
@@ -1,6 +1,7 @@
 {
     "spec_version": "v1.4",
-    "ksp_version": "1.0",
+    "ksp_version_min": "1.0.0",
+    "ksp_version_max": "1.0.4",
     "name": "Real Plume",
     "identifier": "RealPlume",
     "abstract": "A set of effects and basic configs that can be attached to any engine as appropriate.  Requires secondary configs to function correctly.",